Yamaha ATVs - Recent Questions, Troubleshooting & Support


either the float height is wrong, the main jet needle needs lifted or there's an air leak somewhere.

Yamaha 2007... | Answered on Sep 01, 2020


1. Check the INTAKE valve clearance!!!!
2. Check for an air leak
3. Install a new spark plug and air filter!!
4. Check the compression..
5. Have the carb professionally cleaned and set!!
>> Once you have sone all these steps.. repost to me if this did not fix it!!

Yamaha 2004... | Answered on Apr 27, 2020


Carburetor on the side that's wet, need repair.

Yamaha 2005... | Answered on Jan 26, 2020


14 - 41 = 2.93 ratio
15 - 46 = 3.06 ratio..
6-7 links.. you need to move the axle all the way forward when installing a new chain... (it will stretch!) moving the axle all the way forward gives you plenty of adjustment later!!

Yamaha 2005... | Answered on Nov 28, 2019


Get a factory ..or Clymers.. or Haynes service manual... that have the correct diagrams

Yamaha 2007 YFZ... | Answered on Nov 28, 2019


1. replace the spark plug with a new one...
2. check all your on/ff - kill switch(s)
3. If it still will not spark, you will probably need to find a pro with a service manual to start checking electrical system values...

Yamaha 2004... | Answered on Nov 28, 2019


See professional technician!!!

Yamaha 2007 Big... | Answered on Nov 24, 2019


cam sprocket and flywheel..

Yamaha 2004... | Answered on Nov 24, 2019


If you are diggin in this deep .. you need a factory service manual.. Clymers or Haynes manuals will work too!

Yamaha 2004... | Answered on Nov 24, 2019


ooppsss.. FIRST - get the carbs cleaned and set by a factory trained tech!! That will clear up a lot...if it continues to smoke out the right side.. your right side crankshaft oil seal is probably leaking.. use a professional!!!

Yamaha 2004... | Answered on Nov 24, 2019


Factory Service manual, Clymers Manual, Haynes manual

Yamaha 2005... | Answered on Nov 24, 2019


We need a little more details... what/where is clicking..is the engine running when the clicking happens.. more details

Yamaha 2004... | Answered on Nov 24, 2019


Cranking pressure should be around 140+psi

Yamaha 2004... | Answered on Nov 24, 2019


get a colortune tool.it shows how your firing.read instructions that come with,so simple to tune carb in with.sounds like pilot out of adjustment.could also have a leak in ur carb boot or head.take a torch without lighting open valve with motor running run torch around gaskets and front of carb boot listen for change in motor.if it gets higher rev uve found a leak.

Yamaha 2004... | Answered on Oct 25, 2019


let the bear out
change the gas, check the timing

Yamaha 2005... | Answered on Oct 16, 2019


did you check spark by observing the wire or the plug? if the wire, replace the plug. replace it anyway. a bad plug may fire in free air but not in the engine

Yamaha 2004... | Answered on Oct 16, 2019


OMG = there is a youtube video on it. can you believe that?

Yamaha 2004... | Answered on Oct 16, 2019


a search for "high gear looses power" reveals............wait for it...................valve float. == weak springs. Hey, like my back. it is old also and weak

Yamaha 2005 Big... | Answered on Oct 16, 2019

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